Swimming Pool

There is a public swimming pool whose dimensions are 1,020 feet by 980 feet by 7 feet. This pool will hold 3,890 gallons of water. Someone goes into the swimming pool and goes all the way to the bottom of it. He/She comes back to the top of the pool not wet. There is no special equipment used to keep the person dry in any way or to dry the person in any way, other than the sun and wind of course.